Nova that's a real cr*pper feel for you, I've recently had an identical looking scuff done by a brilliant local smart repairer, along with 5 or 6 other little scratches and door-dinks and they are all completely undetectable so it will fix as good as... and all will be well 8)
PS - Stuart, my family motor (along with others) was damaged by some nutter puncturing tyres on a weekly basis at a regular car park, it stopped after some of us fitted these cheapo in-car cams. It's HD (but I've found mine records best in 640x480) and can be left on movement detection, has night vis and cost under £20! The files just keep writing over and if left on constant will hold 24 hrs+ with a 32 SD card. There's loads on fleabay and ideal for so little money. You will need a live lighter socket or wire it in, if not the battery lasts a couple of hours tops.
http://www.ebay.co.uk/itm/FULL-HD-2-5-Car-Camcorder-Camera-Night-Vision-Motion-Detection-1280P-NEW-IN-BOX-/290802108737?pt=UK_AudioTVElectronics_Video_Camcorders&hash=item43b5280941&_uhb=1